#include "Myfile_stdio.h"

#define filename "test.txt"

int main()
{
    _FILE* fp = _fopen(filename, "a");
    if(fp == NULL) return 1;
    
    const char* msg = "hello world";
    int cnt = 5;
    while(cnt--){
        _fwrite(fp, msg, strlen(msg));
        sleep(1);
    }
    _fclose(fp);
    return 0;
}
